Knife blade



FIG. 1 is a front elevation view of the design of the present invention for a knife blade, the rear elevation being identical thereto;

FIG. 2 is a left side elevation view of the knife blade of FIG. 1, the right side elevation being identical thereto;

FIG. 3 is a top end view of the knife blade of FIG. 1; and,

FIG. 4 is a bottom end view of the knife blade of FIG. 1.

The features of the knife handle shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

We claim the ornamental design for a knife blade, as shown and described. 